What deliciousness are you famous for?
What does everyone always request you bring, the delicious thing your family and friends always want you to make?
I have several, but the top most inescapable one is Peanut Brittle. I make dozens of batches of it throughout the month of December and ship it hither and yon.
The question isn't limited to holiday treats, though ... just the deliciousness you're famous for making.